The major aims of this case study were to investigate the effects of task repetition on three adult students’ accuracy and fluency in speaking English. Also, it sought to examine changes to the level of anxiety when speaking, which is a secondary aim. Qualitative research method was applied, with assistance of some quantitative analysis. | Investigating the effects of task repetition on fluency and accuracy in English oral performance of low level adult students: A case study at Vietnam air defence and air force academy